Air circulating fan mounting



Oct. 16, 1934. R. SIEVERT El AL AIRCIRCULATING FAN MOUNTING Filed Feb.6, 1935 Patented Oct. 16, 1934 UNITED STA TES .PATENT OFFICE 1,976,897.sm CIBCULAT/ING FAN MOUNTING Ralph Sievert and Melchior J. Cordes,Carroll,

Iowa

' Application February 6, 1933, Serial no. 655,398 50mm. (c ats-1c for afan, such as one driven by an electric motor; or for a motor whetherused for a fan or for other. purposes, the mounting means being such as'to efiectively prevent the transmission of vibration from the fan ormotor to the member on which the fan or motor is mounted.

More particularly, it is our object to provide a motor support andsheets of resilient material, such as rubber, having their centerssecured to the ends of the motor support and their edges anchored tosupporting members, the sheets being originally flat, but when mounted,being distorted to a substantially conical shape whereby they are placedunder tension to support the motor and efiectively support it in aresilient manner as well as prevent the transmission of vibration fromthe motor to the members to which the sheets are anchored.

Still a further object is to provide a mounting especially adapted formounting an air:circulat-. 'i'ngfan in a cold air duct of a hot airfurnace system, the manner of mounting being such as to provide for easyinstallation.

Still a further object is to provide a motor mounting in the form ofresilient sheets on the ends of an adjustable mounting bar,'the edges ofthe sheets being secured to the edges of openingsin a cold air duct andthe bar being adjusted to such a position as to place \therubber sheetsunder tension.

With these andother objects in view our invention consists in theconstruction, arrangement.

and combination of the various parts or our device, whereby the objectscontemplated'are at-.

tained, as hereinafter more fully set forth, pointedout'in our claims,and illustrated panying drawing, in which:

in the accom- Figure 1 is a vertical sectional view through a cold airduct showing our aircirculating tan mounting means associated therewith,the left end or the figure showing parts in section. Figure 2 is a planview of the'same. s Figure 3 is a, viewsimilar to Figure 1 showing thevmounting installed in -a slightly different type ofcold air duct; and

.On the accompanying drawing, we have usedthe reference numeral 10' toindicate a conduit includes shortening Figure 4 is a perspective view ora rubber sheet defining a cold air duct/such as used in the returnsystem of a hot air furnace. In Figure 1, an all metal duct is shown. Itwill be obvious that it has a top, a bottom and two sides.

When our air circulating fan mounting is used,

openings 12 are cut in the sides of the conduit 10 so that the fan A andthe mounting means B can be inserted through either of the openings. Thefan A preferably comprises a fractional horse-power motor 14 with a fanblade. 16 mount- The mounting B comprises a pair of clamp bars 18 havingsemi-circular portions 18a, bars '20 and angle clips 22. The bars 18 and20 are slotted as clearly shown on the drawing and a .clamp bolt 24 isassociated with them. The clips 22 are riv,-

eted to the ends of the bars 20.

Substantially rectangular sheets 26 are secured at their centers to theclips 22. These sheets are originally fiat. Their edges are adapted tobe secured to the conduit 10 adjacent-the edges of the s openings 12therein. For this purpose, openings. 28 may be punched in the ductsurrounding the openings 12 and hardened screws 30 may be screwed intothe punched openings and ,will form their own threads. Metal coverplates 34 are adapted to be interposed between the heads of the screws30 and the edges of the sheets 26. The motor 14 beats somewhat whenenergized.

It is desirable to have a band of rubber 36 or other resilient materialinterposed, between the motor and the c g p bars 18. To preventthetransmission of h t from the motor 14 to the rubber 36, we provide alayer of insulation 38, such as asbestos.

Originally the bars 18 can be formed" in the dotted line shape shown inFigure 1. Then when they are brought to their installed position onopposite sides of thebar- 20 and the bolt 24 is tightened they willefiectively clamp the motor 36 permitting 14 into position, the rubberhand some slight variation in dimensions.

Withthe clamp bolts 24Jirst installed loosely,

the rubber sheets 26 would assume the dotted line 1 position shown inFigure 1. Proper installation bar B so that the rubber sheets 26 assumea substantially conical shape, as clearly shown and they are thus placedunder tension to support the tan A. When under tension, they provide aneflfective support and also aneflective means to the length or themounting 9' O 2 prevent the on of vibration from the openings, outsidecover plates for said sheets and mounting. bar B to the conduit 10. saidopenings andmeans for securing said cover In Figure 3, we have canbeapplied to a cold air duct defined by joists 11, a iiojor 13 and sheetmetal 10a. Openings 12a are cut in the joists .11, the same astheopenings 12 in the sides of the conduit 10 in Figure 1-.

The sheets 26 and cover plates 34 are then used, wood screws a beingused insteadof the metal screws30. 7

'Iheuse of a rubber sheet distorted to substantiaiJ-y conical sh p asshown'in Figure 4 and thus placed under tension, either by the weight ofthe motor or by the shortening-oi the distance between the ends or amoimting which is secured 'to the sheets, provides an effectivenoiseless mounting especiallypadapted for cold air ducts.

Some changes maybe made in the construction and arrangement or the partsof our device without departing from the realspirit and purpose oi ourinvention, and it is our intention to cover ,by our claims, any modifiedforms of structure or use of mechanical equivalents, which may bereasonably included-withintheir scope. We claim as ourinvention:

1. For use with circulatingtama ran mounting comprising amounting baradapted-to span the air duct, or a conduit having openings in oppositesides thereof, resilient sheets having their centers securedto ing barand their edges secured to. sai'dconduit adjacent the edgesotv saidopenings and outside cover plates for covering both said sheets and saidopenings,

-2. For use with anaireirculating tan, a ran mounting comprising amounting bar adapted to span the air duct of aconduit having openings inopposite sides thereof, resilient sheets having their centers secured tothe ends of said mounting bar and their edges overlami m the edges 01said shown how the invention pla the ends or said mount-- tee and saidsheets to said conduit adjacent the edges of said openings with saidcover plates concealing and protecting said sheets. a

3. For use with a tan, a tan mounting comprising a moimting bar adaptedto span the air duct '0! a conduit having openings in opposite sidesthereof, resilient sheets having their centers tothe ends oisaidmounting bar and their edges secured to said conduit adjacent the 4edges -.ad.iuz-:tal.' le-as to length to vary the distance beof saidopenings, said mounting bar being tween its ends and thereby the tensionon the sheets and cover plates for said sheets and said openings. I

4. For use with an air circulatin ian, a-fan mounting comprising amounting bar adapted to spanvthe air duct of a conduit having p ningslinopposite sides thereof, resilient sheets hav- I ing their centerssecured to the ends or said mounting conduit adjacent the edges of saidopenings, cover. plates for both said sheets and said openings, saidmoimtingbar being of compound construction and the elements thereofhaving slots and clamping bolts extending through said slots whereby thedistance between the ends 0! saidmounting bar may be varied to vary thetension on the sheets. 7

5. Motor mounting means comprising a support for a motor and twoinitilally'flat sheets of bar and their edges secured tosaid resilientmaterial each having their centers se- -cured-to the engls thereof andtheiredges anchored, the length .0: said support relative to thedistance between the anchored edges of said MIELCHIOR J. CORDES.

